<template>
    <div>
        <el-upload
                :action="$http.adornUrl('/admin/file/upload/element')"
                :before-upload="beforeAvatarUpload"
                :headers="{Authorization: $cookie.get('Authorization')}"
                :on-success="handleUploadSuccess"
                :show-file-list="false"
                class="pic-uploader-component">
            <img :src="resourcesUrl + value" class="pic" v-if="value">
            <i class="el-icon-plus pic-uploader-icon" v-else></i>
        </el-upload>
    </div>
</template>

<script>
    export default {
        data() {
            return {
                resourcesUrl: process.env.VUE_APP_RESOURCES_URL
            }
        },
        props: {
            value: {
                default: '',
                type: String
            }
        },
        methods: {
            // 图片上传
            handleUploadSuccess(response, file, fileList) {
                this.$emit('input', file.response)
            },
            // 限制图片上传大小
            beforeAvatarUpload(file) {
                const isLt2M = file.size / 1024 / 1024 < 2
                const isJPG = file.type === 'image/jpeg' || file.type === 'image/png' || file.type === 'image/gif' || file.type === 'image/jpg'
                if (!isJPG) {
                    this.$message.error('上传图片只能是jpeg/jpg/png/gif 格式!')
                }
                if (!isLt2M) {
                    this.$message.error('上传图片大小不能超过 2MB!')
                }
                return isLt2M && isJPG
            }
        }
    }
</script>

<style lang="scss">
    .pic-uploader-component .el-upload {
        border: 1px dashed #d9d9d9;
        border-radius: 6px;
        cursor: pointer;
        position: relative;
        overflow: hidden;

        .pic-uploader-icon {
            font-size: 28px;
            color: #8c939d;
            width: 178px;
            height: 178px;
            line-height: 178px;
            text-align: center;
        }

        .pic {
            width: 178px;
            height: 178px;
            display: block;
        }
    }

    .pic-uploader-component .el-upload:hover {
        border-color: #409EFF;
    }

</style>
